=== If no file names and line numbers are shown below, one can run
            addr2line -Cfie my_exefile my_line_address
    to convert `my_line_address` (e.g., 0x4a6b) into file name and line number.

=== Please note that the line number reported by addr2line may not be accurate.
    One can use
            readelf -wl my_exefile | grep my_line_address'
    to find out the offset for that line.

 0: ./Castro1d.gnu.DEBUG.MPI.ex() [0x5d2ac0]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:107

 1: ./Castro1d.gnu.DEBUG.MPI.ex() [0x5d28c8]
    amrex::BLBackTrace::handler(int)
    /raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:55

 2: /lib64/libc.so.6(+0x385c0) [0x7f0c01ea55c0]
    ??
    ??:0

 3: ./Castro1d.gnu.DEBUG.MPI.ex() [0x8c5c24]
    __ctu_module_MOD_consup
    /raid/testing/castro-gfortran/Castro//Source/hydro/Castro_ctu_nd.F90:592

 4: ./Castro1d.gnu.DEBUG.MPI.ex() [0x8d50ae]
    __ctu_module_MOD_ctu_clean_fluxes
    /raid/testing/castro-gfortran/Castro//Source/hydro/Castro_ctu_nd.F90:547

 5: ./Castro1d.gnu.DEBUG.MPI.ex() [0x8c48ec]
    ca_ctu_update
    /raid/testing/castro-gfortran/Castro//Source/hydro/Castro_ctu_nd.F90:2499 (discriminator 10)

 6: ./Castro1d.gnu.DEBUG.MPI.ex() [0x45e446]
    Castro::construct_hydro_source(double, double)
    /raid/testing/castro-gfortran/Castro//Source/hydro/Castro_hydro.cpp:114 (discriminator 2)

 7: ./Castro1d.gnu.DEBUG.MPI.ex() [0x428b05]
    Castro::do_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:274

 8: ./Castro1d.gnu.DEBUG.MPI.ex() [0x42c175]
    Castro::subcycle_advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:1238

 9: ./Castro1d.gnu.DEBUG.MPI.ex() [0x428746]
    Castro::advance(double, double, int, int)
    /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:103

10: ./Castro1d.gnu.DEBUG.MPI.ex() [0x61ad4f]
    amrex::Amr::timeStep(int, double, int, int, double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2079

11: ./Castro1d.gnu.DEBUG.MPI.ex() [0x61b4e7]
    amrex::Amr::coarseTimeStep(double)
    /raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2366

12: ./Castro1d.gnu.DEBUG.MPI.ex() [0x453a5d]
    main
    /raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:133

13: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f0c01e91413]
    ??
    ??:0

14: ./Castro1d.gnu.DEBUG.MPI.ex() [0x40b7ce]
    _start
    ??:?